JPS60121860A - Pause control circuit of subscriber's telephone set - Google Patents

Abstract

PURPOSE:To make ordinary dial operation to a receiver side possible without a queuing time by stopping the output of a dial signal when a gate circuit is closed but outputting the dial signal when the gate circuit is opened. CONSTITUTION:A gate circuit 8 gates and controls the output operation of the dial signal of a dial signal generating circuit 7. A gate signal generating circuit 10 detects a continuous dial tone which is inputted from a private branch exchange through a telephone line by a specific dial operation, and the circuit 10 gives such gate signal to the circuit that the circuit 8 is closed until this continuous dial tone is terminated. The circuit 7 is stopped from outputting the dial signal when the circuit 8 is closed, but the circuit 7 outputs the dial signal while the circuit 8 is opened, and thus, the dial operation to the other party can be performed following the specific dial operation for operation of exchange and connection of the exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pause control circuit in a subscriber telephone.

For example, when making a call from an internal line to an external line at work, before making the normal dialing operation to make the call to the recipient, a private branch exchange (sometimes called a private branch exchange) is used to exchange and connect the line from the internal line to the external line. It is necessary to operate specific dials such as rOJ.However, normally, a certain amount of time is required to exchange and connect the line in a private branch exchange (in private branch exchange), so it is necessary to complete the exchange and connection of the private branch exchange to the outside line. To let the caller know what you have done and to let them know that normal dialing operations are possible, the caller is given, for example, a continuous dial tone of "two", and until the continuous dial tone is heard, the caller dials normally. Dial operation is prohibited.

During the time required to replace and connect this private branch exchange, a pause timer was used to temporarily stop the dial output from Guyara, and the output of dial signals was prohibited while the pause timer was operating. in this case,
The pause timer operation time, that is, the pause time, is set to be longer than that, for example, about 4 seconds, when the time it takes to switch from an internal line to an outside line is, for example, 2 seconds. For this reason, the caller must wait until they hear a continuous dial tone before dialing the receiver, and then have to wait for a while, as well as press a button to activate the pause timer. The pause timer also required a long pause time, so it required a complex circuit configuration.

The present invention allows dialing to be performed easily and without waiting time by simply dialing the receiver's side as usual, and the dialing output, which had been temporarily stopped after outputting a specific dial, can be changed to a private exchange system. The purpose is to automatically continue dialing as soon as the connection to an external line is completed.

Hereinafter, the present invention will be explained in detail based on an embodiment shown on the M side. FIG. 1 is a schematic circuit block diagram of a subscriber telephone including the circuit of this embodiment.

In Fig. 1, numeral 1 is a keyboard with numerical keys etc. arranged in a matrix and is used for dialing;
is a crystal oscillation element. 3 includes circuit elements to be described later.
This is a chip IC, and the keyboard 1 and crystal oscillation element 2 are connected to this IC3. In this IC3, 1 is a keyboard interface that outputs a signal corresponding to the repetition of key h<-1. , 5 is a memory for storing the output from the keyboard interface 4, that is, the contents of dial operations. 6 is a reference oscillation circuit whose reference oscillation frequency is controlled by the crystal oscillation element 2; This is a dial signal generation circuit that is controlled and forms and outputs a dial signal in response to the output from the memory 5.This dial signal generation circuit 7 outputs a dial signal to the output terminal r3 of the IC3,
Also, a mute signal is output to the output terminal 32 to prevent unnecessary voices from being heard by the receiver while the dial signal is being output.

This embodiment is characterized by the following configuration. That is, the pause control circuit of this example includes a date circuit 8 that performs gate control on the dial signal output operation of the dial signal generation circuit 7, and a private branch exchange (not shown) that performs line exchange and connection from an extension line to an outside line. Detects the continuous dial tone inputted through the telephone Ma9 by operating a specific dial to cause the operation, and closes the date circuit 8 to the gate circuit 8 until the continuous dial tone is detected. The date signal forming circuit 10 includes a date signal forming circuit 10 which provides a gate signal to
A band-removal filter 11 that band-removes the frequency components of 0 Hz and 60 Hz, an amplifier 12, a band-pass filter 13 that band-passes only the frequency components of the continuous tone, a detection circuit 14, and an RS 7 limp 70) block 15 including.

This RS Furi Nfu.

The output of the detection circuit 14 corresponding to the continuous transmission a is applied to the reset terminal R of the 70 tube 15 as a reset signal. Further, a set signal is applied to the set terminal S from the dial signal generating circuit 7. Furthermore, the output terminal σ is given as a low level output or a data signal to the date circuit 8.

FIG. 2 is a branch tree-like circuit diagram of the data I/signal forming circuit 1(). In FIG. 2, the band rejection filter 11 constitutes a switched capacitor filter,
Capacitors C1, C2, (1, C4 and operational amplifier A 1
, A 2 and X isoti S 'r'V ] + S
It includes W 2 and S W3. Amplifier 12 is a resistor)
<1° R2 and operational amplifier A3. Bandpass filter] 3 similarly constitutes a switched capacitor filter, and capacitors C5, CG, C"i
.

C8, operational amplifier A4 + A5, and switch S
It includes W4 and SW5. A6 is a buffer. The detection circuit 14 includes a diode D and a capacitor c5.
].

cio and a resistor R,3. RS 7 'J tube 70°p 15 contains /Agate Nu, N2. 1ii
8w5 moves between the corresponding contacts tLt2, tl', and t2' in response to the oscillation frequency.

In a circuit with such a configuration, in order to make a call from an extension to an outside line, the caller C1 first hangs up the handset, presses a specific dial number, for example 10, on the keyboard 1, and then dials the number of the other party. Press the button corresponding to the dial number. Then, a dial signal corresponding to the specific dial number 10 is output from the output terminal 31 of 103, and when the output of the specific dial number is completed, a signal is sent from the dial signal generation circuit °7 to the set manual S of the R37 lip 70 knob 15. A gate signal is outputted from its output terminal Q, and is applied to the gate circuit 8. The date signal closes the date circuit 8, and the dial signal generating circuit 7 is prohibited from outputting the dial signal since the reference oscillation circuit 6 is not provided with an output due to the date circuit 8. At this time, the memory 5 stores information corresponding to the dial number of the other party. Next, at the same time as the continuous beep from the private branch exchange is detected, the gate signal forming circuit 10 is no longer supplied with the Day 1 signal, thereby opening the gate circuit 8. Therefore, the dial signal generation circuit 7 can output a dial signal to the output terminal 31 of the IC 3 based on the information from the memory 5. In this manner, in this embodiment, after performing a specific dialing operation to connect an extension line to an outside line, it is possible to continue dialing the other party without waiting time. At the same time, after the specific dial is output, the dial output, which has been temporarily stopped, is automatically continued and output when the connection to the outside line is completed.

FIG. 3 is a circuit 70 diagram when this embodiment is applied to a pulse dialer, and corresponding parts are designated by the same reference numerals as those in FIG. 1. What should be noted in FIG. 3 is that the dial signal generation circuit 7 is connected to the system 11 clock generation circuit 16,
It consists of a readout circuit 17 and a dial signal output circuit 18.

This system clock generation circuit 16 is a reference oscillation circuit 6.
A system clock is generated in response to the output from the keyboard, and this system clock is applied to the keyboard interface 4 and the readout circuit 17.

The readout circuit 17 operates in response to this system clock and reads out information corresponding to the dial operation from the memory 5. The dial signal output circuit 18 outputs the read dial signal to the output terminal 31 of the IC3. 19 is a line 1 pointer that specifies the write address of the memory 5 in response to the output from the keyboard interface 1;
20 is a memory 5 in response to the output from the readout circuit 17.
This is a read pointer that specifies the read address.

The operation of the pulse earer shown in Fig. 4 will be explained with reference to Fig. 4. Figure 4 (a) shows the hook switch on the handset.
- shows the waveform of the wack switch output as a high level output. FIG. 4 (1,) shows the current waveform of the telephone line. [-0J] shown in Figure 4 (1)
, l' fl J Book 7'', the first ``+'l j is the dial number corresponding to a specific dial operation, and the next ``
01, and then 17'' corresponds to the other party's station number.

Then, below each numerical value, the number of pulse waveforms corresponding to the numerical value is shown. The waveform indicated by symbol A in FIG. 4 (1,) corresponds to the continuous tone. FIG. 4(c) shows the waveform of the operation input from the keyboard 1.

Each numerical value rOJ, rOJ, I'7JT5 in Figure 4(c)
The pulse waveform at the first "O" in the smell corresponds to a specific dial operation, and the following 1oJ,
The pulse waveform at 'l'' 7 J 5'' corresponds to the dial number of the other party. Figure 11(d)
shows the output waveform of the RS7 limp '70 tube 15. In the waveform of FIG. 4(d), the low level period corresponds to the time required for the exchange example to connect from the extension line to the outside line. FIG. 4(e) shows the output waveform of the dial signal generating circuit 7. FIG. FIG. 4(f) shows the output waveform of the mu) signal. In the figure, +nO is a line showing the relationship between the detection timing of the continuous beep output waveform and the timing at which the output of the gate signal forming circuit]() changes from low level to high level;

m 2 and m 3 are lines showing the relationship between the rise 1) timing of the pulse waveform in FIG. 4(c) and the generation timing of the pulse waveform in FIG. 4(e).

FIG. 5 is a circuit block diagram when this embodiment is applied to a tone dialer, and parts corresponding to those in tItJ1 and FIG. 4 are designated by the same reference numerals (=I. The dial signal generation circuit 7 is controlled by the outputs of the readout circuits 17 corresponding to the row side (row) and the column side (column) of the keyboard 1, and outputs the frequency obtained by dividing the reference oscillation into one frequency. A row counter 21 and a column counter 22 that count the outputs of both counters 21 and 22, respectively, and skin counters 23 and 24 that count the outputs of both counters 21 and 22, respectively.
and D
/A converters 27 and 28 and an amplifier 29 are installed. 30 is a mute signal output circuit.

The operation of the tone guiara shown in FIG. 5 will be explained with reference to FIG. 6. FIG. 6(a) shows a hook switch output waveform that is output as a high level output when the hook inch of the handset is raised. FIG. 6(b) shows the current waveform of the telephone line. A total of 71 "()" shown in FIG. , corresponds to the other party's station number.

Then, below each numerical value, a number of current waveforms corresponding to the numerical value are shown. The waveform indicated by symbol A in FIG. 6(1,) corresponds to a continuous tone. FIG. 6(c) shows the waveform of the manual operation of the keyboard 1.
'5j, the pulse waveform at the first 1-OJ corresponds to a specific dial repetition,
The following rOJ, I7J.

The pulse waveform at "5" corresponds to the dial number of the other party. Figure 6(d) shows R37S, P7
0. Figure 5 shows the output waveform of Step 5. In the waveform of FIG. 6(d), the period of low level corresponds to the time required for switching from an extension line to an outside line. In FIG. 6(e),
The output waveform of the dial signal generation circuit 7 is shown. Figure 6 (f
) shows the output waveform of the mute signal. In the figure, +114
is a line showing the relationship between the detection timing of the output waveform A of the continuous beep and the timing at which the output of the date signal forming circuit 10 changes from low level to high level, and m5 is the dial in FIG. 6(e). This is a line showing the relationship between the end timing of the signal waveform and the falling timing of the pulse waveform in FIG. 6(e). When this embodiment is applied to a pulse dialer or a tone dialer, after performing a specific dialing operation to connect an extension line to an outside line, the dialing operation of the other party can be continued without waiting time. be able to. At the same time, the dial output, which has been temporarily stopped after outputting the specific dial, is automatically output at the same time as the connection to the outside line is completed.

As described above, according to the present invention, there is provided a subscriber telephone equipped with a memory that stores the contents of dial operations, and a dial signal generation circuit that forms and outputs a dial signal in response to the output from the memory. A gate circuit that gate-controls the dial signal output operation of the dial signal generating circuit described in Titj, and a specific dial operation that allows the private branch exchange to switch and connect the line from the internal line to the external line via the telephone line. A date signal forming circuit is provided which detects a continuous beep manually inputted from a private branch exchange and supplies a gate signal to the gate circuit to close the date circuit until the continuous beep ends, and the dial signal is The generation circuit. While the gate circuit is closed, the output of the dial signal is stopped, and when the date circuit is open, the dial signal is output.
By performing a specific dial operation for connection operation followed by a dial operation on the other party's side, the dial operation can be performed easily and without waiting time, and it is possible to perform normal dial operations on the receiver side. This eliminates the need for a pause timer with a complicated circuit configuration.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, and FIG. 1 is a circuit block diagram showing an outline of the circuit in a subscriber telephone (including the circuit of this embodiment). A specific circuit block diagram of the date signal forming circuit shown in FIG. 5 is a circuit block diagram when the above embodiment is applied to a tone guarara, and FIG. 6 is a waveform diagram for explaining the operation of FIG. 5. 1 is a keyboard, 2 is a crystal oscillation element, and 3 is a waveform diagram. IC14 is a keyboard interface, 5 is a memory, and 6 is a base 1 (I
- an oscillation circuit, 7 a dial signal generation circuit, 8 a gate circuit, 9 a telephone line, and 10 a date signal formation circuit. Applicant ROHM Co., Ltd. Agent Patent Attorney Oka1) Kazuhide

Claims (1)

[Claims] (1) A subscriber telephone comprising a memory that stores the contents of a dial operation, and a dial signal generation circuit that forms and outputs a dial signal in response to the output from the memory, the dial signal generation circuit A gate circuit that controls the output operation of the dial signal, and a continuous dial tone that is manually input through the telephone line by operating a specific dial that allows the private branch exchange to switch and connect the line from the internal line to the external line, is detected, Until the continuous beep is detected, a gate signal forming path is provided for supplying a gate signal to the date circuit to close the gate circuit, and the dial signal generating circuit is configured to generate a gate signal when the date circuit is closed. 1. A pause control circuit in a subscriber telephone, characterized in that output of a dial signal is stopped when the date circuit is open, and a dial signal is output when the date circuit is open.